Electrical train-stop.



PATENTED MAY 7, 1907.

'H. G. SEDGWIGK. ELECTRICAL TRAIN STOP.

APPLICATION FILED JUNE 14, 190B.

witnwaeo :shown and described in the aforesaid 'co- HIRAM e. SEDGWIOK, or MILL VALLEY, CALIFORNIA.

ELECTRICAL Application filed June 14,

To all loll/Mn it may (on/Jerri..- Be it known that I, HIRAM. G. Snnewrcx, a

citizen of the United States-f America, and a resident of Mill Valley, county of Marin, State of. California, have invented certain new and useful Improvements in Electrical Train-Stops, of which the following is a full and clear specification, reference being had to the accompanying drawings, in which- Figure 1 is a diagram'showing my present improvements connected. up to one end of a train-stopping block system such as de scribed in my co-pending application No.

321,763, filed June 14, 1906; and Fig. 2 a detail plan View of the motor and connected train of gearing.

i The object of the present invention is to provide a simplified form of signal arrangementfor use in connection with train-stopping. block systems, especially the system pending.application, the essential feature of the invention lying in the provision of means whereby the semaphore 41s normally held at. danger and is drawn down to safety position by means of train-operated electrical devices and, held down during the passage of the train into the block, the circuit arrangements being such that if the block be preempted by a train therein the semaphore cannot be lowered to safety, so that the semaphore will indicate to the engineer whether or not the block is clear.

1 To the accomplishment of this object and such others as may hereinafter appear, the

. invention consists of the parts and combination of parts hereinafter fully described, and

particularly pointed out in the appended claims, reference being had to the accompanymg drawings forming a part of this'speci- 'fication, in which the same reference characters-designate like parts throughout the sev: eral views.

Referring to the drawing annexed by reference-letters, a designates the stoppingcontacts, I) the setting-contacts, and c the restore'contacts, which. are connected by suitable circuit arrangements with a relay bond mounted on theadjacent roadbed, as set forth in my aforesaid .co-pending application. The arrangement of circuits and de-' vices in the relay box are such that when the I stopping-contacts a are active a circuit 6' be open at a point in box d but when the stopping-contacts. are inactive this circuit 6 W111 be closed in the box d. In the present Specification of Letters Patent.

TRAIN -SIOP.

' instance I have shown but one end of the block, the line wires e and f being arranged to extend to the other end of. the block the same as formerly.

The circuit 6 includes an electric motor 8 and a battery 7 and its terminals are connected to insulated rail sections 5 which latter serve as roadbed contacts in that the wheels of the train pass over them the wheels and axles serve to close circuit 6 at that point and thereby throw the current from-battery 7 into motor 8, this of course only taking place when the circuit 6 is closed at box (1.

The numeral 2 represents a semaphore arm of the usual construction and 2 a weight carried at the rear end thereof and. being of sufficient avoirdupois to normally hold up the semaphore arm. A pullrod 11 is connected to the semaphore at its upper end and at its lower end to the end of the lever 12 which is normally drawn upward by a coil spring 13. The semaphore is -drawn down to safety by means of an arm 16 carried by a disk mounted rotativel on shaft 18. This'disk 1-5 is held frictions. y against rotation by a spring 17 and the shaft 18 is driven through the medium of-a gear 1.4 on the motor shaft. I

. When the motoris rotating arm 16 will be carried downward against lever 12 and thus draw down the semaphore arm until lever 12 strikes pin 19.' When lever 12 strikes the positive stop 19 the arm 16 is arrested in its rotative movement but the motor may continue to o 'erate as the disk 15 carrying said arm is o y frictionally held on the shaft 18. Thus it will be observed that so long as the motor operates the arm 16 will hold lever 12 down against pin 19 but when the motor stops theweight'2 and the spring 13 over danger. Itwill bepbserved therefore that as a train appfoaclies the head of the block it will bridge contacts 5 and complete circuit- 6 if the stopping devices ware ifi-a'c'ti'ife' andthe block is free. Asy soo n as pair of wheels of" the train strike the contact rails safety, and, in the manner above described, the semaphore will be held down until the trainhas passed the contact rails, after which the semaphore will be returned to danger. -The distance between the contact rails 5 and;

shaft 18 and meshing with a pinion on the come the frictional resistance of spring 17v I and automatically return the semaphore to the motor will draw down the semaphore to lament of h p yst i i dzif cal I 'be broken at 4 by the dropping of the semasuch that the train will pass into the block and preempt it immediately after releasing the semaphore.

If desired, I may use in this system the supplemental stopping-circuit 3 shown and claimed in my aforesaid application, this circuit being connected with the safety-contacts at one end and at its other end being closed by contacts 4, so that so long as the semaphore is at danger the contacts a will be active and will stop the train unless the circuit 3 phore to safety.

It will be apparent to those skilled in the art-that various mechanical embodiments of i the invention are possible and I, therefore, do not wish to be limited to the exact ar- 1 rangement and construction shown.

What I claim and desire to secure by Letters Patent is 1. In a train-stopping system, the combination of the stopping devices in the block, a partial circuit connected thereto and adapted to be closed when a block is unoccupied, contacts on the roadbed adapted to be closed by an oncoming train, a motor and battery in said circuit, a semaphore normally at danger, and means operated by the motor when its circuit is completed by an oncoming train to shift the semaphore to safety, substantially as set forth.

2. In combination with a train-stopping block system, train-stopping devices in the block, a partial circuit connected thereto and adapted to be closed thereby when the block is unoccupied, rail sections adapted to be bridged by an oncoming train, a battery and a motor in said circuit, a semaphore nor- 1 mally held at danger, and means operated by the motor for drawing the semaphore down to safety when a train passes oversaid rail contacts and holding it down while the train is assing over said rail contacts, substantia ly as set forth.

3. In a train-stopping system, the combination of stopping devices in the block, embodying a partial circuit and means for closing this circuit when the block is unoccupied, a signal and train-operated devices for moving said signal to danger, these devices being included in said partial circuit and said circuit being adapted to be closed by the train approaching the block, whereby if the block be not preempted the signal will be brought. to safety 4. In combination with train-stopping devices on the roadbed, these devices embodying a partial circuit and means for closing this circuit when the block is not preempted, roadbed means for closing this circuit at an other point by a train approaching the block, a signal normally held at danger, and electrical' means in said circuit for bringing the signal to safety by the approaching train if said circuit be closed, said means embodyin means whereby the signal is returned to safety automatically as soon as said circuit is broken. 7

In testimony whereof I hereunto affix my signature in the presence of two witnesses this 7th day of April 1906.

HIRAM G. SEDGWICK.

Witnesses:

ERNEST J. Mor'r, B. S. CRozIER.

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